/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
   Copyright (C) 2009 Sébastien Kirche

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#ifdef HAVE_CONFIG_H
#if defined (CONFIG_BROKETS)
/* We use <config.h> instead of "config.h" so that a compilation
   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
   (which it would do because it found this file in $srcdir).  */
#include <config.h>
#else
#include "config.h"
#endif
#endif

#include <errno.h>
#include "fnmatch.h"
#include <ctype.h>


/* Comment out all this code if we are using the GNU C Library, and are not
   actually compiling the library itself.  This code is part of the GNU C
   Library, but also included in many other GNU distributions.  Compiling
   and linking in this code is a waste when using the GNU C library
   (especially if it is a shared library).  Rather than having every GNU
   program understand `configure --with-gnu-libc' and omit the object files,
   it is simpler to just do this in the source for each such file.  */

#if defined(_LIBC) || !defined(__GNU_LIBRARY__)


#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
extern int errno;
#endif

/* Match STRING against the filename pattern PATTERN, returning zero if
   it matches, nonzero if not.  */
int fnmatch(const char *pattern, const char *string, int flags){
	register const char *p = pattern, *n = string;
	register char c;

	/* Note that this evalutes C many times.  */
#define FOLD(c)	((flags & FNM_CASEFOLD) && isupper(c) ? tolower(c) : (c))

	while((c = *p++) != '\0'){
		c = FOLD(c);

		switch(c){
			case '?':
				if(*n == '\0')
					return FNM_NOMATCH;
				else if((flags & FNM_FILE_NAME) && *n == '/')
					return FNM_NOMATCH;
				else if((flags & FNM_PERIOD) && *n == '.' &&
						(n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
					return FNM_NOMATCH;
				break;

			case '\\':
				if(!(flags & FNM_NOESCAPE)){
					c = *p++;
					c = FOLD(c);
				}
				if(FOLD(*n) != c)
					return FNM_NOMATCH;
				break;

			case '*':
				if((flags & FNM_PERIOD) && *n == '.' &&
					(n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
					return FNM_NOMATCH;

				for(c = *p++; c == '?' || c == '*'; c = *p++, ++n)
					if(((flags & FNM_FILE_NAME) && *n == '/') ||
						(c == '?' && *n == '\0'))
						return FNM_NOMATCH;

				if(c == '\0')
					return 0;

				{
					char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
					c1 = FOLD(c1);
					for(--p; *n != '\0'; ++n)
						if((c == '[' || FOLD(*n) == c1) &&
							fnmatch(p, n, flags & ~FNM_PERIOD) == 0)
							return 0;
					return FNM_NOMATCH;
				}

			case '[':
				{
					/* Nonzero if the sense of the character class is inverted.  */
					register int not;

					if(*n == '\0')
						return FNM_NOMATCH;

					if((flags & FNM_PERIOD) && *n == '.' &&
						(n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
						return FNM_NOMATCH;

					not = (*p == '!' || *p == '^');
					if(not)
						++p;

					c = *p++;
					for(;;){
						register char cstart = c, cend = c;

						if(!(flags & FNM_NOESCAPE) && c == '\\')
							cstart = cend = *p++;
                        else
                            cstart = cend = FOLD(cstart);

						if(c == '\0')
							/* [ (unterminated) loses.  */
							return FNM_NOMATCH;

						c = *p++;
						c = FOLD(c);

						if((flags & FNM_FILE_NAME) && c == '/')
							/* [/] can never match.  */
							return FNM_NOMATCH;

						if(c == '-' && *p != ']'){
							cend = *p++;
							if(!(flags & FNM_NOESCAPE) && cend == '\\')
								cend = *p++;
							if(cend == '\0')
								return FNM_NOMATCH;
							cend = FOLD(cend);

							c = *p++;
						}

						if(FOLD(*n) >= cstart && FOLD(*n) <= cend)
							goto matched;

						if(c == ']')
							break;
					}
					if(!not)
						return FNM_NOMATCH;
					break;

				matched:;
					/* Skip the rest of the [...] that already matched.  */
					while(c != ']'){
						if(c == '\0')
							/* [... (unterminated) loses.  */
							return FNM_NOMATCH;

						c = *p++;
						if(!(flags & FNM_NOESCAPE) && c == '\\')
							/* XXX 1003.2d11 is unclear if this is right.  */
							++p;
					}
					if(not)
						return FNM_NOMATCH;
				}
				break;
				
			default:
				if(c != FOLD(*n))
					return FNM_NOMATCH;
		}

		++n;
    }

	if(*n == '\0')
		return 0;

	if((flags & FNM_LEADING_DIR) && *n == '/')
		/* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz".  */
		return 0;

	return FNM_NOMATCH;
}

#endif	/* _LIBC or not __GNU_LIBRARY__.  */

//Local Variables:
//coding: utf-8
//end:
